394444656 has 60 divisors (see below), whose sum is σ = 1124747208. Its totient is φ = 128998272.

The previous prime is 394444649. The next prime is 394444657. The reversal of 394444656 is 656444493.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394444657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18210 + ... + 33473.

Almost surely, 2^394444656 is an apocalyptic number.

394444656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

394444656 is an abundant number, since it is smaller than the sum of its proper divisors (730302552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394444656 is a wasteful number, since it uses less digits than its factorization.

394444656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51750 (or 51741 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 394444656 is about 19860.6308056919. The cubic root of 394444656 is about 733.3793752543.

It can be divided in two parts, 39444 and 4656, that added together give a square (44100 = 210²).

The spelling of 394444656 in words is "three hundred ninety-four million, four hundred forty-four thousand, six hundred fifty-six".